Installation of the Waste-Water De-icing Heater Elements

TASK 30-71-53-400-001-A
Installation of the Waste-Water De-icing Heater Elements

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

ZONE: 131
FIN: 41DU ** ON A/C NOT FOR ALL
FIN: 42DU ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05EML7)	Epoxy Adhesive-- - Legacy 3
(Material No.08ABC1)	Aqueous Cleaner-Aircraft Exterior Pressure Spraying -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
131	FORWARD CARGO COMPARTMENT
825
FOR [41DU] (HEATER-TAPE,)
FOR [42DU] (HEATER-TAPE,)
131EF, 131FF, 131GF, 131GW, 131HW

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 30-71-00-710-002-A	Operational Test of the Waste-Water Ice-Protection Heater-Elements
TASK 30-71-17-400-001-A	Installation of the Waste-Water De-icing Sensor
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-003-A	Open the FWD or Aft Cargo-Compartment Door with the Hand Pump
TASK 52-30-00-860-004-A	Close the FWD or Aft Cargo-Compartment Door with the Hand Pump
Heater Elements

3. Job Set-up
Subtask 30-71-53-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the door 825.
(3) Make sure that forward cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001) (Ref. AMM TASK 52-30-00-860-003).
(4) Make sure that cargo-compartment light switch 6LU is set to ON.
(5) Make sure that sidewall panels and floor panels
(a) FOR [41DU] (HEATER-TAPE,), [42DU] (HEATER-TAPE,)
131GW 131HW 131GF 131FF 131EF are removed.

Subtask 30-71-53-865-051-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	POT/WASTE WIP-HEATER-LINE	1DW	A02
2000VU	POT/WASTE WIP-HEATER-CTL	2DW	A01

4. Procedure
Subtask 30-71-53-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Heater Element
(1) Preparation for installation:
(a) Clean the waste water line (9) with Aqueous Cleaner-Aircraft Exterior Pressure Spraying - (Material No.08ABC1) and a Textile-Lint free Cotton - (Material No.14SBA1) .
(2) Do a visual inspection of the component interface and/or the adjacent area.
(3) Put the heater elements (4) and (5) in position on the waste water line (9).

NOTE: The two heater elements are located on the two sides of the waste water line.

(4) Attach the heater elements (4) and (5) to the waste water line with the Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) (6).

NOTE: Make sure that the heater elements (4) and (5) are correctly installed on the waste water line (9).

(5) Install the sensor (40DU) (Ref. AMM TASK 30-71-17-400-001).
(6) Connect the three wires of the heater elements (4) and (5) to the terminal strip.

NOTE: Connect the electrical wires as identified during the removal procedure.

(7) Insulate all the pipes with the insulation sleeve (1).

NOTE: Make sure that the electrical connections do not touch the insulation sleeve (1).

(8) Put Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) (2) on the longitudinal cut of the insulation sleeve (1).
(9) Install the insulation muffs (8), the adhesive tape and safety it with the velcro tape (3).
(10) Install the spacers (11) and the clamps (10).
(11) Attach the identification and warning labels with the cable ties.

NOTE: Do not damage the insulation sleeve (1) with the cable ties.

Subtask 30-71-53-865-052-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	POT/WASTE WIP-HEATER-LINE	1DW	A02
2000VU	POT/WASTE WIP-HEATER-CTL	2DW	A01

Subtask 30-71-53-710-054-A ** ON A/C NOT FOR ALL

C. Do an operational test of the waste water ice-protection (Ref. AMM TASK 30-71-00-710-002).

5. Close-up
Subtask 30-71-53-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install sidewall panels and floor panels
(a) FOR [41DU] (HEATER-TAPE,), [42DU] (HEATER-TAPE,)
131GW 131HW 131GF 131FF 131EF.
(3) Set cargo-compartment light switch 6LU is set to OFF.
(4) Close forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002) (Ref. AMM TASK 52-30-00-860-004).
(5) Remove the access platform(s).

Subtask 30-71-53-862-050-A ** ON A/C NOT FOR ALL

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 06:20:18 UTC